Reversible-explosive-rotary-engine unit.



- W. E. PEARSON. I REVERSIBLE EXPLOsIVEROTABY ENGINE UNIT.

APPLICATION FILED 1130.4, 1907;

' Patented Oct. 20, .1908;

\ a sums-sun f W. E. PEARSON.

REVERSIBLE EXPLOSIVE ROTARY ENGINE UNIT.

APPLICATION FILED DEO.4,1907.

9O 1 ,554, Patented Oct. 20, 1908.

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W fl y lll|llllllllllllllllllllllllllll millm W; E. PEARSON.

REVERSIBLE EXELOSWE-EOTARYENGINE UNIT.

APPLICATION FILED DEG.4, 1907. E 901 554. t Patented Oct. 20, 1908. v E 5 SHEETS-SHEET s.

VIE- 1555555 V via/M M WM MW W. E. PEARSON.

REVERSIBLE EXPLOSIVE ROTARY ENGINE UNIT.

APPLICATION FILED 13110.4,19071 Patented Oct. 20, 1908.

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[ IEIE'EE E W. E. PEARSON.

REVERSIBLE EXPLOSIVE ROTARY ENGINE UNIT.

"APPLICATION FILED DEG.4,1907.

901,554 Patented Oct. 20, 1908.

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compressor with the carburettor attached.

, mixtures of air and WILLIAM E. PEARSON,

nnvnnsmm-nxrnoszvn OF SWAMrscorT, MASSACHUSETTS.

moranmnnemn Um'r'.

To all whom it may concern: 1 Belt known -that I, WILLIAM E. PEARSON,

a citizen of the United States, of Swampscott, 1n the county of Essex and State-of ful Improvement in Reversible-Explosive- Rotary-Engine Units, of which the following, taken in co nection with the accompanying drawings, is a specification.

My invention relates to that class of exploslve rotary engines in-which compressed gases or vapors are used (power; and consists in the arrangement of parts, and

for generating construction an may be best understood by reference to the full description.

The ob ect of the inventionis toso construct and arrange the parts that the Whole shall constitute a unit for developing power, all the elemen'ts'of the engine having continuous rotary. movements, and are so constructed that. by the movement of a hand lever the engine'will'reverse its rotation. This object I attain by the mechanism illustrated 111 the accompanying drawings, in which I Figure l is a front elevationof m machine; Fig. 2 is an end elevation of t e engine proper, viewed from line 2-2 of 'Fi 1, made on a larger scale than Fig. 1. Fig. 1 shows an end elevation of a part of the Fig. 3 1s a vertical cross section taken throu h the casing of the engine but showing thepiston carrier, pistons, the buttress and the valves in end elevation. Fig. 4is a section of the en inc and one of the-rotating valves taken on ine 44 of Fig. 3. a Fig. 4 shows the outer edge of one of the pistons, that is the part that bears on the interior surface of the cylinder. Fig. 5 is an end view of a part of the engine casing showing an adjustable bearing for the 'ournal of the buttress. Fig. 6 is a horizontal section taken on line 6-6 of F1 3. In the drawings the base of theentire machine is represented by A, Fi 1, and is supported upon legs, A, A. T e standard A supports one end of the main shaft B of the engine proper B. The engine 1s secured to the base A, as shown.

Referring particularly to Figs.'3 and 6, the construction of the engine proper will be exlained. The cylindrical casing is indicated iiy B, and the ends by B, B. is the piston carrier and is mounted upon the main shaft Specification Letters Patent. Application filed. December 4,

in Fig. 3, and springs 0, thus insuring a close fit and pro- 70 Patented Oct. 20, 1908; 1907. Serial No. 405,108.

B The said iston carrier 0 has at its ends packing rings O which are forced outward against thejnterior ofthe casing B and B,

by springsC C The radial arms, C C one o W 'ch is shown in full lines in Fig. 4 and two of them are shown in end view in Fi 4. These radial arms 0*, C pass throug grooves made in the end of the pistons 0 4, and act as said pistons.

which there are l ackings for the ends of the he said pistons C, C of two, are shown in end view are forced outward with viding for wearing.

The buttress, D, is moiinted upon the shaft D and has a piston-receiving recess (1 This buttress makestwo rotations for one rotation of. the piston carrier 0, and is connect- 75 I ed by gearing, see Figs. '2 and 6, to the piston carrier. The said gearing consists of a large spur gear B which enga es with a gear wheel D of one-half the iameter, on the shaft D The said shaft is justable housings D which have springs D and adjusting screws D". The rotating buttress D has packing rings D D, at its ends which are kept in contact with the inside of the casingby spiral springs D-D.

haust port, E, but requires two inlet ports, K and K, which are controlled by rotating valves; the construction of the said valves is shown in Figs. 3 and 4. Each controlled by a rotating valve H ,.w1ich is mounted upon a shaft H and is rotated bya spur gear H*, on the shaft of the said rotating valve. One of these rotatin valves is acking rings have as shown in Figs. 4 and mounted in ads My engine is reversible and has one exinlet ott is shown in section in Fig. 4 T10 charge is supplied to the rotating valve by the pipe H, a which is interiorly connected with the openings H through which the charge flows into the center chamber of the valve and from it is discharged through the openings H (when 1 the valve is in position) into the piston chamber N or N that is, into the chamber N to cause the pistons to move in one direction, that of the arrow, into the chamber 1 to cause them to move'in that is the reverse.

I wiil now describe the compressor and its connection, see Fig. 1. The compressor-coir sists of a pum ,L, of the rotary class and is so constructe that it will work equally well l when running in either direction, t rat is, it is a reversiblerotary pump,

the other direction,

an explosive mixture as a char e for the rotary engine proper. The explo ing charge is drawn from the carburetor B, through the pipe L into the compressor pump L ;-from the pump the charge is forced through the pipe L to the mixer L This agitator or mixer consists of a casing L of any suitable dimensions and has within it a shaft L having propeller-like wings L -L which rapidly rotate and thus keep the charge mixed. To increase the efficiency of this device, I place within the outer casing L an inner casing L arranged as shown, leaving a passage between the inner and outer casings and free passage at each end so that irrespective of the way that the fans L L rotate there I will be strong currents and eddy currents in the mixer casing or tank. This is essential as the charge is often but a mixture of air and vapor and sometimes air and a s rayed fluid or air and a fixed as of a ifi'erent gravity or densit It will be seen that this construction will maintain a homogeneous condition of the charge or mixture Whether the engine turns in one direction or the other. The mixing fans are driven by the main wheel B acting through the adjustable friction pulley L and the pulley L". From the mixer L L the charge passes through the pipe N N, to the threeway cock N thence through. the pipe N to the lower rotating valve H, see Fig. 3, or through the I ing valve, a so indicated by the etter H. In the latter case the charge passes through the port K and causes the engine to operateas indicated by the arrow, Fig. 3. .Andin the other case the charge passes through the port K and the engine is reversed. The three-way cock N is operated by the hand lever N see Fig. 1. To prevent a too great pressure in the mixer L L, a pipe 1? leads to a relief valve P, from which a pipe P P returns to the inlet pipe L of the pump L.

Another and very important feature of my engine is the clearance port, of which there are two, T and T, Fig. 3, located near the spark plugs S and S The object of these 0 earance ports is to allow of the escape of air and gases that may remain in the piston chamber after the piston has passed the exhaust port E; for instance, referring to Fig. 3 we see that the piston C has passed the exhaust port E, and that the chamber N must of necessity be filled with air taken in at the port E, or with the roducts of combustion remaining in the said chamber, after the explosion, and that had not been driven out before the piston assed theexhaust port, it

is evident that un ess the said dead contents of the chamber N is allowed to escape it will check, by becoming condensed, the rotation of the piston carrier or it will ass by the buttress D and expanding fill the chamber between the buttress D and the piston C", and

ipe N N", to the upper rotatthus prevent a full explosive charge from entering through the valve K, the clearance port T being closed- Another advantage of having the piston chamber freed from air or other dead charge is that when the new charge is admitted it is not diluted, and hence lowered in its efiiciency, by the said air or other dead charge. It being understood that when the engine is running direct, that is, in the direction of the arrow, the clearance port T is always closed, and when the engine is reversed the clearance port T is always close l v The means for opening and closing the clearance ports may be described as follows: Attached to the hand reversing lever N Fig. 1, that operates the three-way cock N is a short arm M, which is connected by the link M to a short arm h 2 which operates the valve of the clearance ort T. The same link M is also connects by asecond li M to a short lever M which operates the va e of the clearance ort T. v

From t e above it may be seen that the lever which controls the explosive charge and sends it to the direct charge port K or to the reverse charge ort K also controls the clearance ports T and T always closing one when opening the other.

Claims. 4

1. An explosive rotary engine unit, comprising a casing, having exhaust and inlet ports; a cylindrical continuously rotating piston carrier and pistons; a continuously rotating buttress; continuously rotating valves controlling and directing the charges; a continuously rotating charge compressor, a charge reservoir having rotating mixers, and means for operatively connecting the several parts; substantially as and for the purpose set forth.

2. A reversible explosive rotary engine unit, comprising a casing, having exhaust and inlet ports; a cylindrical continuously rotating piston carrier and pistons; a continuously rotating buttress; continuously rotating valves controlling and directing the explosive charges; a continuously rotating charge compressor; a charge reservoir; an exhaust port and clearance orts and means for operatively connecting t e several parts; substantially as and for the purpose set forth.

3. A reversible explosive rotary engine unit comprising a casing having exhaust and inlet ports; a cylindrical continuously rotating piston carrier and pistons; continuously rotating valves control ing and directing the charges; a continuously rotating charge compressor; a charge reservoir having continuously rotating mixers; clearance ports and means for operatively connecting the several parts; substantially as and for the purpose set forth.

i. In a rotary engine apparatus, a reversing valve, a lever for operating the said valve,

clearance ports having closing valves and name to this specification in the presence of mechanism connecting said reversin valves two subscribing witnesses, on this 3d day of withthe closing valves of the said 0 earance December A. D. 1907.

valves whereby the said reversing valves and WILLIAM E. PEARSON. 5 the said clearance valves will be operated sub- Witnesses:

stantially as and for the fpurpose set forth. I FRANK G. PA

RKER, In testimony whereo I have signed my WILLIAM EDSON. 

